Terrible writing, awful story, childish characters, absurb story flow, ridiclous plot holes. 100% trash, don't read it.
The MC is your average high school boy that all of sudden become top class hit man able to kill a small group of gang around 20 members eventhough he is never have any training or knowledge about any weapons whatsoever yet he can use any weapons like expert.
The MC is high school student and yet he got blush and emotional over holding hand with a female classmate like 11 years old will do.
There is no explanation whatsoever about the app itself like how it able to have all sort of OP features, so overall it feel so absurb and rushed.
Everyone seem so indifferent toward killing someone else as if it is a game eventhough it already state as being the real world.
There is world building at all, the enemies are also one dimensional goons while some are merely to add the words count so overall nothing matter.
All in all, don't read this trash.